Isotope shield



FIG. 1 is a perspective view of an isotope shield, showing my novel design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken line showing the syringe in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an isotope shield, as shown and described. 